A302862 - cp's OEIS frontend

A302862 a(n) = [x^n] (1 + theta_3(x))^n/(2^n*(1 - x)), where theta_3() is the Jacobi theta function.

n	a(n)
0	1
1	2
2	4
3	8
4	20
5	57
6	160
7	422
8	1076
9	2780
10	7449
11	20462
12	56348
13	153909
14	418268
15	1139703
16	3126068
17	8618611
18	23801146
19	65708424
20	181391905
21	501296216
22	1387834518
23	3848187985
24	10680579812
25	29660831057
26	82415406493
27	229156296047
28	637659848888
29	1775648562970
30	4947475298595

[1, 2, 4, 8, 20, 57, 160, 422, 1076, 2780, 7449, 20462, 56348, 153909, 418268, 1139703, 3126068, 8618611, 23801146, 65708424, 181391905, 501296216, 1387834518, 3848187985, 10680579812, 29660831057, 82415406493, 229156296047, 637659848888, 1775648562970, 4947475298595]

cp's OEIS Frontend

A302862 a(n) = [x^n] (1 + theta_3(x))^n/(2^n*(1 - x)), where theta_3() is the Jacobi theta function.

Table of values

List of values